Sheave.



110. 812,488. 1111111111111 FEB-.13, 190e. w. o. FISCHER.

SHEAVE.

APPLIoATxoN FILED 001:3. 1904.

WW1/Leone@ UNITE STATES WILLIAM CHARLES FISCHER, @F NEW i?.

PATENT @Fitliiild RK, N. Y., ASSIGNQR Ti) STAHL YORK.

SHEVE..

Specification of Letters'atent.

Patented Feb. 13, 1995.

s K Application filed October 3, A1904. Serial No. 226,947.

To all whom it may concern:

Be it known that I,\WILL`IAM CHARLES FISCHER, a citizen of the United States, and a resident of the boroughof Manhattan, city, county, and State of New York, have invented certain new and useful Improvements in Sheaves, of which the following is a specifica-- inafter appear; and o these ends the inven tion consists of a she e as a new article of manufacture for carrying out the above objects, embodying the features of construction and combination of elements and arrangement of parts, substantially as hereinafter fully described and claimed in this specification and shown in the accompanying draw ings, in which- F ivure l is an elevation of a complete whee Fig. 2 is a cross-section on the line 2 2 of Fig. 1. Fig. 3 is an elevation of the middle piece removed. 1F ig. 4 is a cross-ser il n on the line 4 4 of' Fig. 3. Fig. 5 is a perspective view of` the hub-piece.

The sheavevis formed of two similar side plates A A 'and a middle piece B, all of which may be stamped from cold sheet metal. The side plates A A are provided with ilanges F F, so that when the two are placed together to form the sheave these ilanges form' a groove o1 rim. A series of slots are formed in the side platesnear the ilange F, and a central aperture 1I is provided for a hub or axle. The middle piece B is provided with a series of tongues T, formed by cutting the edge ol' the plate, as shown in Figs. 3 and 4. These tongues are bent alternately to either side,

and the completed shcave is formed by insorting the tongues throu h the slots of the two side plates A A and ending the same over upon the side plates. These tongues may be bent either toward the center or toward the rim. I provide a tubular hub, as shown in Fig. 5, by stamping out a piece of' metal and eurling'the same into a cylinder, having a nib N, which engages the niche' M in 4the central plate B and is thereby prevented from turning.

I know that sheaveshave been constructed of sheet metal tied together with tongues; but such are all made by forming the tongue of part of one side plate and ins( i Jig it in a slot inthe other side plate. ihat weakens the metal. Again, certain spaces must exist between the tongues, which tends to allow the flanges forming the groove to spread apart. I overcome these defects by the use of the middle or independent lookingpieco between the side plates, as the side plates are thereby tied through an entire circle either on one side or the other.

@bvio'usly some features or" this invention may be used without others, and the inven tion may be embodied in wid ey varying forms.

Therefore without limiting the invention to the construction shown and descrilied nor claiming equivalents, I claim, and desire lo secure by Letters Patent, the 'folles-ring:

1. As a new article of menu.aeturra a sheave formed of two side plates having flanges to form a rim, and a reid die piece provided with tongues, the said side plates being provided with slots 'througli which said,

tongues protrude and said tongues being C bent to loch the parts together, substafmtially for the purposes set forth.

2. As a new article of manufacture, a sheave formed of two side platos having flanges to 'form a rim, and a middle piece provided with a series of tonguesidisposed alternately on each side thereof, each oln said side plates having a series of slots thro-dgl which saidtongues protrude and said tongues bei w bent against said side plates to tie the p together, substantially for the purgjioses et forth.

3. As a new article i oi' manul'euture a sheave 'formed ol two side pin-los having flanges to form a rim and provided witli a se ries of slots, a middle piece having tongues disposed alternately on each'side thereof to cooperate with said slots to tie the parts tecircuarvaperture for a hub and a. cyiudrcu two subsebing Witnesses.

hub 'formqd 0i' one, piece of metal having a vivir f fw r I T p 'Aug thereon and integral. therewith to engage W @MLM/l UARMES FSL'LR' 5 a notch in Said midle piece, aubsmmziay for Wi'messs:

. the purposes set forth.

Y L, RUSSELL Low TARBQX, In test'xmony Whereo; have saguer my EDWEN N WHITFIELD.

vgether, smid middle piece having a @shtml name to this speccaton in the pmsence of 

